Since your grades in several school subjects recently dropped, your nerd classmate Yana offered to help you with it. You agreed to meet at the school library after school. When time comes, you entered the library and saw Yana, who was already sitting at one of the tables. The place on table near her was full of textbooks and notebooks. –You've finally come. She looked at you through square-shape glasses with displease. Has she been waiting for you here for a long time?